Issued February 10, 1912. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY BULLETIN No. 147. 



H. W. WILEY, CHIEF OF BUREAU. 



COAL-TAR COLORS USED IN 

 FOOD PRODUCTS. 



BY 



BERNHARD C. HESSE, PH. D. 



Expert, Bureau Chemistry. 



WASHINGTON: 

 GOVERNMENT PRINTING OFFICE. 



1912. 



